TS372CN - Dual CMOS Comparator, 8-DIP | STMicroelectronics
MPN: TS372CN ✓ Hoạt độngTS372CN Tóm tắt
A voltage comparator is an analog integrated circuit that compares two input voltages and changes its output state when the difference crosses a reference level. Comparators belong to the broader interface and signal-conditioning hierarchy, where they convert physical voltage relationships into logic-level events. The TS372CN’s dual-channel architecture provides independent decisions within one package, reducing board area compared with two separate single comparators.
Key characteristics include supply current of 0.1 mA per comparator independent of supply voltage, input bias current of 1 pA typical, and input offset current of 1 pA typical. The device operates from a 1.5 V to 8 V single supply or from dual supplies within the stated ±8 V limit. Its open-drain outputs can support TTL-compatible interfacing, while the low-power operation is useful when continuously powered sensing is required.
The CMOS input stage is suited to monitoring high-impedance sources because the extremely low bias current minimizes loading of the measured node. Each comparator can evaluate an input against a reference voltage or against the other input when configured as a differential comparator. The manufacturer datasheet should be consulted for the complete electrical characteristics, input common-mode limits, output sink-current limits, and propagation-delay curves.
Typical applications include battery-powered threshold detection, sensor-condition interfaces, window comparators, overvoltage and undervoltage indication, low-level signal crossings, and general dual-threshold logic. Two independent channels can also implement hysteresis, zero-cross detection, or a pair of complementary limit checks without requiring two separate IC packages.
Designers should account for the open-drain output architecture by providing a pull-up resistor at every output used with subsequent digital logic. Input common-mode voltage, output timing, and supply bypass requirements must remain within the manufacturer’s specified operating limits. Decoupling capacitance should be placed close to the supply pins, while sensitive input traces should be kept short and away from switching nodes.
This page organizes the key electrical characteristics, commercial information, package details, application guidance, and available cross-reference information for engineers evaluating the TS372CN. It also highlights where a substitution requires direct pin and parameter verification rather than relying on package similarity alone.
Bộ thay thế dễ dàng lắp đặt cho TS372CN — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TS372CN (cùng hình factor và footprint) — khác nhau ở Comparator Type, Number of Comparators, Output Type, Response Time, Supply Current per Comparator.
TS372IN
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Xem tài liệu →TS372CN Tỷ lệ tối đa & tính chất điện
| Comparator Type | Precision differential CMOS voltage comparator |
| Number of Comparators | 2 units |
| Single Supply Voltage Range | 1.5 V to 8 V |
| Dual Supply Voltage Range | -8 V to +8 V |
| Supply Current per Comparator | 0.1 mA typical |
| Input Bias Current | 1 pA typical |
| Input Offset Current | 1 pA typical |
| Maximum Input Offset Voltage | 12 mV |
| Response Time | 200 ns |
| Kiểu đầu ra | Open-drain |
| Logic Compatibility | TTL-compatible |
| Khoảng nhiệt độ hoạt động | 0 °C to +70 °C |
| Package Type | 8-DIP |
| Số chân | 8 pins |
| Kiểu lắp đặt | Through-hole |
| Technology | CMOS |
Hướng dẫn cấu hình chân TS372CN 8-dip
Cấu hình chân cho TS372CN (8-dip gói). Thành phần số hiệu này có chân đầu vào, đầu ra và nguồn cung cấp. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết cấu hình chân bù, bù trừ và chân kích hoạt. Hoàn hảo cho điều kiện tín hiệu và mạch khuếch đại.
Không có dữ liệu chân cụ thể sẵn có cho TS372CN.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
TS372CN phù hợp cho 6 Áp dụngs: Battery-Powered Threshold Detection, Industrial Sensor Signal Conditioning, ADC Input Range Limiting, Overvoltage and Undervoltage Detection, Zero-Cross and Event Detection, Portable Measurement Equipment.
Battery-Powered Threshold Detection
The TS372CN is well suited to battery-operated threshold detection because each comparator consumes 0.1 mA typical while providing two independent comparison channels. One channel can compare a sensor-derived voltage against a reference, while the other can monitor a second limit or create hysteresis. Its 1.5 V minimum single-supply operation supports compact systems that cannot accommodate a higher supply floor, and the 1 pA typical input bias current reduces loading of high-impedance dividers. When driving a microcontroller input, the open-drain output requires an appropriate pull-up and should be checked for acceptable rise time.
Được đề xuất
Industrial Sensor Signal Conditioning
The TS372CN can convert a slowly varying sensor signal into a logic event for an industrial controller. Its 1 pA typical input bias current is valuable when the sensor is represented by a high-value divider or high-impedance source, while the dual configuration supports two independently set thresholds. A typical implementation compares the conditioned sensor voltage with a precision reference and drives an open-drain input through a pull-up. The 0 °C to +70 °C operating range suits ordinary indoor industrial equipment, but system designers should evaluate input common-mode limits, noise margins, and output timing before connecting the comparator to a particular controller.
Được đề xuất
ADC Input Range Limiting
The TS372CN can supervise a signal before it reaches an analog-to-digital converter, providing a hardware threshold event when the signal exceeds an acceptable range. The comparator's 200 ns listed response time is suitable for many supervision functions, while its extremely low input bias current avoids materially disturbing the measured source. The dual arrangement can monitor upper and lower limits or provide a complementary window-comparator function. Because the outputs are open-drain, separate pull-up resistors or suitable wired logic can combine the channels, and the complete implementation must respect the ADC input range and the comparator's specified common-mode limits.
Được đề xuất
Overvoltage and Undervoltage Detection
The two independent TS372CN channels can implement overvoltage and undervoltage supervision around a protected power rail or signal range. One comparator detects operation above an upper threshold, and the other detects operation below a lower threshold. Open-drain outputs allow the events to be pulled up independently and interpreted by a controller or combined into a fault indication. The low 0.1 mA typical supply current per comparator is advantageous in continuously powered systems, while 1 pA typical input bias current helps preserve accuracy when the thresholds are generated by high-impedance networks. The actual thresholds depend on resistor accuracy and the reference used.
Được đề xuất
Zero-Cross and Event Detection
The TS372CN can detect the crossing of a signal through a reference level and generate an open-drain event for digital processing. Such a circuit is useful in waveform monitoring, signal-presence detection, and simple timing applications where a slowly changing analog signal must be converted into a logic transition. The 1 pA typical input bias current is particularly helpful when the signal originates from a high-impedance source. Designers should verify propagation delay across the actual input overdrive because the 200 ns headline response does not describe every transition condition. Slow signal edges near the threshold can also cause repeated switching and may require hysteresis.
Được đề xuất
Portable Measurement Equipment
The TS372CN is appropriate for portable measurement equipment that combines several low-voltage analog thresholds with minimal power consumption. Two channels can handle limit detection without requiring two comparator packages, and the 1.5 V minimum supply supports compact battery-powered designs. Its low input bias current reduces errors when connected to high-impedance transducers or resistor networks. The open-drain outputs also permit low-current pull-ups, which can help control standby power, although the resistor value must still satisfy the required logic rise time. For precision measurements, the system should account for the listed 12 mV maximum input offset and use suitable calibration or threshold hysteresis.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TS372CN — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TS372IN |
|---|---|---|
| Package | 8-DIP | 8-DIP |
| Brand | STMicroelectronics | STMicroelectronics |
| Comparator Count | 2 units | 2 units |
Bảo phân biệt quan trọng
- Two independent comparator channels in one low-power package (vsTS372IN)
- Very low supply current independent of supply voltage (vsTS372IN)
- Extremely low input bias current (vsTS372IN)
Ghi chú thiết kế
Do not treat an open-drain output as a actively driven logic output. Install a pull-up resistor on every comparator output that connects to a digital input, and select the resistance using the required sink current and maximum allowable rise time. Leaving the output floating can produce undefined transitions. Also verify that the pull-up voltage remains within the output and supply ratings.
Place the supply bypass capacitor close to the device's supply and ground pins, and keep the return path short to reduce supply-impedance effects. Route comparator inputs away from switching nodes and digital clocks because input coupling can create false threshold transitions. When high-impedance sources are used, minimize PCB leakage and contamination around the input nodes because the 1 pA typical bias current is very small.
Add positive feedback to create hysteresis when the monitored signal can cross the reference slowly or contain noise. Hysteresis prevents repeated output toggling around the threshold, but its voltage width must remain small enough for the required detection accuracy. Use the manufacturer timing and common-mode curves to confirm that the input transition rate and voltage level satisfy the comparator's operating conditions.
Include the open-drain pull-up current in the total power budget, not just the 0.1 mA typical supply current per comparator. Estimated: continuous pull-up current is approximately Vpull-up divided by Rpull-up; multiply that result by the number of continuously active channels and add the comparator supply current. This estimate does not include logic input leakage or transient output currents.
Thông tin tuân thủ
No definitive RoHS, REACH, lead-free, halogen-free, or conflict-minerals statement was identified for this exact ordering code. The 0 °C to +70 °C device is not presented as an automotive-qualified variant.